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DMS-30PC-4/20S
4-20mA Input 3? Digit Panel Meters
with Full-Size LED Displays
Examples
+24V
1. Desired display readings are:
ON
+
+V (TB2-1)
4mA ="0.00"
(TB1-1)
+
DMS-30PC-4/20S-24RL
20mA = "2.00" 1 2 3 4 5 6 7 8
Use DIP-switch setting #1 and enable decimal point DP2 via SW6.
Apply 4mA and adjust R3 so the display reads "0.00". Apply 20mA and
LOOP-POWERED
TRANSMITTER
–
4-20mA
N.C.
(TB1-2)
–
adjust R7 so the display reads "2.00".
–V (TB2-2)
2. Desired display readings are:
24V GROUND
4mA = "–100"
12mA = "000"
ON
Figure 3. Typical Connections for Loop-Powered Transmitters
Driving Single-Ended Meters.
20mA = "100"
1
2
3
4
5
6
7
8
+24V
Use DIP-switch setting #4. Apply 12mA and adjust R3 so the display
+V (TB2-1)
reads "000". Apply 20mA and adjust R7 so the display reads "100".
Apply 4mA and the display should read "–100". For these display read-
ings, no decimal points are used. Set SW5, SW6 and SW7 to OFF.
+
DMS-30PC-4/20S-24RL-I
(TB2-2)
–V
3. Desired display readings are:
ON
+
+ (TB1-1)
(TB1-2)
–
+
4mA = ".000"
12mA = ".250" 1 2 3 4 5 6 7 8
This example is not as straightforward as the previous two. Notice that
SINGLE-ENDED
TRANSMITTER
–
4-20mA
4-20mA
–
PLC or OTHER
SINGLE-ENDED
DEVICE
12mA is exactly halfway between 4mA and 20mA. If we assume the
input could go up to 20mA, the display reading would be: 2 x .250 or
".500". From the table, we can select DIP-switch setting #2 and enable
DP1 via SW5. Apply 4mA and adjust R3 so the display reads ".000".
Apply 12mA and adjust R7 so the display reads ".250".
+24V
+
24V GROUND
Figure 4. Typical Connections for Isolated-Supply Meters
in Series with an Auxiliary Device
+5V
+V (TB2-1)
CONNECTION DIAGRAMS
+
4-20mA
(TB1-1)
+
DMS-30PC-4/20S-24RL
LOOP
TRANSMITTER
+24V
+
+V (TB2-1)
–
(TB1-2)
–
+
4-20mA
(TB1-1)
+
DMS-30PC-4/20S-24RL
24V GROUND
–V (TB2-2)
5V GROUND
SINGLE-ENDED
TRANSMITTER
Figure 5. Typical Connections for +5V Powered Meters. Note that 5V Ground
–
24V GROUND
(TB1-2)
–
–V (TB2-2)
and 24V Ground are Tied Together Inside the Meter.
Figure 2. Typical Connections for Single-Ended Transmitters Driving
DMS-30PC-4/20S-24XX-I
Single-Ended +24V Powered Meters.
Figure 6. Typical Connections for Loop-Powered Transmitters
Driving Isolated-Supply Meters (-I part number suf?x).
www.murata-ps.com/dpm
24 Mar 2011
email: sales@murata-ps.com
MPM_DMS-30PC-420S.B04 Page 3 of 4
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